To maybe take a different spin on the question, the challenge with wartime British and Commonwealth vehicles tends to be information. You can get copies of most (if not all) US vehicle manuals, but British and Commonwealth manuals are more difficult to come by.
On the plus side, this means there is a good community of owners, and a few folks who have decent collections of manuals can be goldmines of information. On the downside, finding details of which parts to look for, let alone finding those parts, can be a challenge. This tends to be double problematic as many parts sellers won't know what they've got either. You tend to have to trust your gut at parts fairs and swap meets.
While I'm not a carrier owner, keep this in mind, as you may want to invest a few more pennies to get a more complete starting point.